Circle in the sky, Santiago Chile, 19-20 hrs. 2 -3 days before Atlantis was Launched, 86',87' not sure.

My brother,Cousin, Friend ,Dad, Mom and I( Mom and Dad were called out to see it)we were playing outside the front yard, when we saw a moving star. it was sunset and it look just like one of the first stars of the evening, we beleived it was the Atlantis but it not been launched yet, it was moving slowly, it mover over another star so we ruled out been a helicopter or something , then it stoped and a light came from a point(apeard just like a flash light in the fog.)without moving, then looked like if it trund on it's place and the light became a circle, much bigger then the original light, this cirlcle then got bigger and it just fade away along with the light.
Witness indicates that the date of the sighting is approximate.  PD